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A square pieced from four triangles.
Also known as: QST unit, Hourglass block unit, Four triangle square
A quarter-square triangle is a pieced square made from four right triangles meeting at the centre, giving a unit whose outer edges run along the fabric grain.
Is a square pieced from four right triangles meeting at the centre.
Contexts: History
Puts the straight grain on the unit's outer edges where a half-square triangle puts the bias, which is why one is chosen over the other at a block's edge.
Contexts: History
A square divided by both diagonals into four triangles meeting at its centre point.
A fuller structured visual breakdown is not yet documented for this symbol.